CN201041454Y - Nitrogen protection brazing furnace intermittent furnace drying device - Google Patents
Nitrogen protection brazing furnace intermittent furnace drying device Download PDFInfo
- Publication number
- CN201041454Y CN201041454Y CNU2007200366047U CN200720036604U CN201041454Y CN 201041454 Y CN201041454 Y CN 201041454Y CN U2007200366047 U CNU2007200366047 U CN U2007200366047U CN 200720036604 U CN200720036604 U CN 200720036604U CN 201041454 Y CN201041454 Y CN 201041454Y
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- drying box
- air channel
- drying
- nitrogen
- drying device
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Abstract
The utility model discloses a drying device used for nitrogen protection brazing furnace batch kiln, and belongs to the preceding stage drying device field of the nitrogen protection brazing furnace. The utility model has the technical proposal that the drying device used for nitrogen protection brazing furnace batch kiln comprises a drying box body; an internal circulating blower fan, a heating band and an air duct separating cover are arranged in the drying box body; the internal circulating blower fan is positioned at the top part of the drying box body; the air duct separating cover is connected with the internal circulating blower fan and positioned under the internal circulating blower fan, thereby forming a wind circulation loop in the drying box body; the heating band is arranged at the lower part of the drying box body, and is positioned under a transferring chain plate; a work piece is arranged on the transferring chain plate; both the work piece and the transferring chain plate are arranged in the air duct separating cover; an air outlet opening is arranged on the drying box body. Through the direction of an arranged internal circulating blower fan impeller, the utility model ensures that the air flow is stable after circulating, and the good during effect can be performed. The utility model can ensure that the air flow is relatively even under the dead state of the work piece through an arranged splitter plate under the transferring chain plate used to position the work piece, and the drying effect is further improved.
Description
Technical field
The utility model relates to a kind of nitrogen-protective soldering furnace prime drying device, relates in particular to a kind of nitrogen-protective soldering furnace batch furnace drying device.
Background technology
Aluminum brazing furnace is a kind of equipment that each parts of aluminium heater are effectively connected.Be that this characteristic of utilizing the alloy melting point of almit Al-Si to be lower than components A l metal material fusing point is welded.Solder places near the solder side that needs connecting portion or the inside usually; between parts and solder side, reach the surface and scribble soldering flux; after drying is installed; parts are heated to the brazing alloy fusion and the infusible temperature of parts metal under the protection of certain inert gas atmosphere; soldering flux is broken the oxide-film of aluminium simultaneously; allow its motlten metal and do not carry out diffusion into the surface between the deposite metal, after the cooling, braze metal will with the parts contact-making surface between form metal and combine.
At present, existing most drying devices adopt the method for heat dryings, usually because its drying equipment is provided with unreasonablely, thereby drying effect is poor, in addition, dry energy consumption height.
Summary of the invention
The purpose of this utility model provides the good nitrogen-protective soldering furnace batch furnace drying device of a kind of drying effect.
Further purpose of the present utility model provides a kind of low cost, energy-conservation, nitrogen-protective soldering furnace batch furnace drying device that drying effect is good.
The utility model adopts following technical scheme:
A kind of nitrogen-protective soldering furnace batch furnace drying device; comprise drying box 1; circulating fan 2 in being provided with in it; cover 3 is separated in tubular electric heating 6 and air channel; interior circulating fan 2 is positioned at the top of drying box 1; the air channel is separated cover 3 and is connected with interior circulating fan 2 and is positioned at below it; thereby make and form the wind closed circuit in the drying box 1; when interior circulating fan 2 is worked; the wind that separate in the cover 3 in the air channel flows to top from the bottom; flow downward through the space of interior circulating fan 2 backs by air channel cage 3 outsides; tubular electric heating 6 is positioned at the bottom of drying box 1; and be in the below of conveyer belt 4 and flow distribution plate 5; workpiece is positioned on the conveyer belt 4 and both all are in the air channel and separate in the cover 3, also is provided with exhaust outlet 7 on drying box 1 top.
In the technical program, in cover 3 was separated in the air channel, the below of the conveyer belt 4 of place work piece was provided with at least one air channel flow distribution plate 5, has equally distributed hole on the air channel flow distribution plate 5.Also comprise metal curtain 8, metal curtain 8 is located on the interface 9 of drying box 1 and preheating purifier, and the hot gas that comes out from the preheating purifier enters in the drying box 1 by metal curtain 8.Drying box 1 bottom is provided with brazing flux dust collection dish.
Principle: each active section structure function of nitrogen-protective soldering furnace batch furnace is introduced.
1, dry kiln:
Dry interior is made up of hot air circulation temperature control heating system, electrothermal tube heating power 60kw, interior circulating fan 2.2kw, 1450r/min, digital temperature controller, solid-state relay (or temperature control module) are formed heating control system, and with the chain control of blower fan.Exhaust outlet is equipped with in the hothouse upper end, links to each other with external exhaust blower pipeline.Brazing flux dust collection dish is equipped with in the hothouse bottom, can dismantle from the side, regularly removes indoor rubbish.Arrival end dress metal curtain, the workpiece height limiter is equipped with in the outside, with the anxious chain work that stops, reports to the police of transmission; The port of export and clean room join, can be with the recycling once more back of the nitrogen that the clean room discharges outside steam is discharged hothouse.
2, clean room:
Indoor skin is the stainless steel manufacturing, and two cover temperature controllers are controlled the not two outer temperature of overlapping radiant heaters of chamber of horse respectively, and the outside is provided with heat-insulation layer, and skeleton is a formed steel construction.Cross over the two ends of workpiece, in the metal curtain is housed, the port of export is equipped with pneumatic door, can be according to service requirement adjustment and automatic shutter, inlet links to each other with hothouse, the flow of warm nitrogen gas drying chamber of discharging behind the purification utilization can be utilized once more.When workpiece was parked in therebetween, the inflated with nitrogen regulated device that is provided with in the clean room and the flow of warm nitrogen gas of utilizing the soldering section to discharge purified workpiece, to improve the utilization rate of thermal power transfer and nitrogen.
3, soldering section:
This section working chamber be by airtight double-deck horse not in hall and two the electrical heating districts and two interior circulating fans constitute, the burner hearth two ends are provided with pneumatic door, can be according to the gap and the automatic shutter state of service requirement adjustment inlet.Structure is the heat-resistance stainless steel manufacturing entirely, the about 400mm of insulation layer thickness, maximum operating temperature reaches 700 ℃, for the ease of safeguarding and the raising thermal efficiency, top adopts the built-in high-temperature electric heat rod of insertion to heat temperature adjustment, be divided into two temperature-controlled areas (to improve temperature-controlled precision), heater suitably is arranged in the top of driving-belt and workpiece; Two groups of radiant electric heaters are equipped with in the below in the body of heater outside, and by the chain control of two cover temperature control assemblies, make it to utilize better electric heater that the direct radiation of workpiece added thermal effect and temperature control performance.In the process of inflated with nitrogen heating, adopted the interior thermal circulation fan of two low noises to carry out enforceable atmosphere heat convection, to improve the uniformity of each point temperature, atmosphere.
The two-port of every electrical bar is equipped with the seal washer locking nut, to protect the nitrogen unfailing performance at work and the convenience of maintain and replace.
Two soldering residues removing mouths are equipped with in the braze chamber bottom, can dismantle from the side, regularly remove inner residue.
Brazing area nitrogen access to plant has adopted to mix by thermal circulation fan in two low noises that reinject after purifying the preheating chamber preheating and has entered furnace chamber, not influence the temperature stability in the stove and the uniformity of atmosphere in the process that guarantees soldering.In the use of nitrogen by flowmeter, manually adjust valve, magnetic valve etc. and form flow observation, control system; By a cover sampling pump, little analysis of oxygen content instrument is formed the gas concentration detection system.Two system mutuals can be controlled quality technological requirement and best consumption gas production cost effectively.
4, water cooling chamber:
Be made up of the double-layer stainless steel structure, furnace chamber therefrom passes the formation cooling jacket, and the port of export is equipped with metal air curtain curtain and pneumatic door, can be according to the service requirement automatic shutter, and outer side of door is equipped with gas skirt (access gas exhaust piping).
Indoor by three the part form.First is: the heat convection of water jacket compartment inwall environment and heated work pieces; Second one is: circulating fan and water-cooled pipe type heat exchanger combination in the water cooling chamber strengthens heat exchange; Third part is: cold nitrogen air curtain compensation atmosphere.Water cooling chamber forms the water supply and sewage road by a water inlet and an overfall.Design feature: improved the heat exchange effect, shortened cool time, the controllability of interior circulating fan and cooling water system can make temperature lowering curve become adjustable.When the workpiece operation is come out of the stove, when the nitrogen feed system can change nitrogen supply (NS) amount in the stove automatically and changes in the stove nitrogen pressure reduction, at first be that cold nitrogen air curtain is to workpiece air cooling, thereafter automatic time delay reduces nitrogen adjusting supply again, to guarantee the atmosphere requirement of workpiece in transmission and cooling procedure.Interior circulating fan can require omnidistance speed change according to the cooling of workpiece, regularly open and close, for the cooler environment of workpiece requires to provide motor-driven reliable operating condition.
5, aircooling cabinet:
Indoor mainly is to be constituted one-way gas flow and discharged outdoor by hair-dryer and exhaust blower.Process is that the workpiece that will cool off in atmosphere runs to and forces in the air to be cooled near environment temperature, and the heat that swaps out and waste gas is discharged simultaneously outdoor, is convenient to the operation of removal workpiece operation.
6, upper and lower workpiece section: be respectively maximum workpiece enough open type working faces are provided, form by self-loopa driving-belt, formed steel construction.
7, transmission device: device constitutes the synchronous operation mechanism of connecting by last workpiece, drying, preheating, soldering, water cooling section, two driving-belts of air-cooling chamber and following workpiece section, main drive is the reducing gear that threephase asynchronous machine and reductor are formed, and is moved by electrical control.Travel line speed can be set in 1000～2000mm/min scope, and can be set at equal speed change raising speed starting as required, to even speed change deceleration halted state.Can show the machine operation frequency as required, the operation actual linear velocity of guipure also can be set the operating system of motor overload (moment) guard mode.
8, the bloated processing of body of heater line:
The body of heater of equipment has the length variations amount of expanding with heat and contract with cold in various degree in the normal temperature state change procedure different with operating temperature, can influence some the position distortion of beat kinematic error and body of heater and hinder operate as normal.Therefore, apparatus linear expansion coefficient power-assist, slip cancellation element.Mainly form by travelling carriage, power-assist cylinder.
9, temperature control system: dry section is formed the chain control circuit of temperature by a digital temperature controller of cover and a temperature sensor with an interior thermal circulation fan and electric heater; Purify upper and lower two ones of preheating zone, form the chain control circuit of temperature by the two digital temperature controllers of cover and temperature sensor and two electrocaloric effects respectively; Brazing area is formed the chain control circuit of temperature by two cover digital temperature controllers and temperature sensors with two interior circulating fans and two district's electric heaters, controls the interior two ends of brazing area adjustment respectively.Electric heating is regulated and is adopted silicon-controlled voltage regulation module input instrument temperature PID4～20mA continuous signal to carry out the continuous electric flow of control heater, reach control, stabilized operating temperature.
10, warning system: the upper and lower limit of each temperature control point temperature of soldering oven is reported to the police, hydraulic pressure and flow, compressed air pressure, nitrogen pressure are reported to the police, little oxygen amount detection range is reported to the police, each road motor overload is reported to the police, workpiece spacing alarms etc. can be by the regional location of control operation screen indication directly perceived alarm point.
The utility model obtains following useful technique effect:
1. circulating fan 2 made the gas flow in the drying box in the utility model adopted, thereby had increased the uniformity of dry indoor temperature, and drying effect is good; Separate cover 3 by adopting the air channel, make the gas in the drying box circulate according to a certain direction, because tubular electric heating 6 is in the bottom of drying box and is positioned at the below of conveyer belt 4, rise through the hot gas after the heating of heating tape, therefore by the direction of interior air circulation fan impeller is set, thereby make the gas in the cage upwards flow, the outer gas of cage flows downward, meet the hot gas come-up, the gas motion rule that cold air sinks, thereby circulation back steady air current can play good drying effect, otherwise, if direction is opposite, very easily forms the turbulent flow of type of flow confusion, thereby reduce drying effect.
2. has equally distributed hole on the air channel of the present utility model flow distribution plate 5, the bottom is through the gas of heating, by air channel flow distribution plate 5, on the one hand, because the flow velocity of the effect hot blast of aperture strengthens, it is effective to blow on workpiece heating, and flow velocity also can make water vapour take away the efficient height soon, thereby drying effect is good; On the other hand, air channel flow distribution plate 5 has limited the formation that turbulence in the cover 3 is separated in the air channel, take out of from workpiece thereby help water vapour, therefore, can make that by the air channel flow distribution plate that is arranged at transmission carrier bar 4 belows that are used for place work piece 5 drying effect further improves.
3. exhaust outlet 7 makes unnecessary water vapour and other gas metal curtain discharge in the utility model, and metal curtain 8 makes that on the one hand the gas in the hothouse is difficult for entering the clean room (when the air pressure in the hothouse raises, unnecessary gas is discharged by exhaust outlet, and the metal curtain is heavier, only when surpassing to a certain degree, superpressure just opens), on the other hand, when the air pressure in the clean room raise, gas entered hothouse by metal curtain 8; Usually the temperature (being higher than 300 degrees centigrade) of the gas in the clean room is than high many of the temperature in the hothouse (being lower than 300 degrees centigrade), and the hot gas that comes out in the clean room enters the effect that hothouse can increase drying, thereby by metal curtain 8 is set, the hot waste gas that has effectively utilized the clean room to discharge has been saved the energy.For heavy fire door is set, adopt the metal curtain, scheme is simpler.
4. the brazing flux dust collection dish that is provided with of the bottom of drying box can be dismantled from the side, regularly removes indoor rubbish, thereby avoids because having too much rubbish absorbs water, and reduces dry effect.
Description of drawings
Fig. 1 is the utility model cross section (along the driving-chain transmission direction) figure
Fig. 2 is the utility model longitudinal section (perpendicular to the driving-chain transmission direction) figure
The specific embodiment
A kind of nitrogen-protective soldering furnace batch furnace drying device; comprise drying box 1; circulating fan 2 in being provided with in it; cover 3 is separated in tubular electric heating 6 and air channel; interior circulating fan 2 is positioned at the top of drying box 1; the air channel is separated cover 3 and is connected with interior circulating fan 2 and is positioned at below it; thereby make and form the wind closed circuit in the drying box 1; when interior circulating fan 2 is worked; separate in the cover 3 in the air channel; near the draught fan impeller place; form negative pressure; thereby; the wind that separate in the cover 3 in the air channel flows to top from the bottom; flow downward through the space of interior circulating fan 2 backs by air channel cage 3 outsides; tubular electric heating 6 is positioned at the bottom of drying box 1; and be in the below of conveyer belt 4; tubular electric heating 6 is normally by resistance wire; insulating barrier; the heat resisting steel shell constitutes; thereby make its safe and reliable long service life; and by having the thermocouple temperature regulating device control of (being used to measure the temperature in the casing); workpiece is positioned on the conveyer belt 4 and both all are in the air channel and separate in the cover 3, also is provided with exhaust outlet 7 on drying box 1 top.Drying device is the workshop section that the nitrogen-protective soldering furnace batch furnace is handled workpiece, and workpiece is positioned over and transmits on the carrier bar, and by its transmission.Be typically provided with interface between each workshop section and communicate, interface can separate with door or metal curtain.
In the technical program, in cover 3 was separated in the air channel, the below of the conveyer belt 4 of place work piece was provided with at least one air channel flow distribution plate 5, has equally distributed hole on the air channel flow distribution plate 5, determines according to the size of work area and blower fan usually.Also can comprise metal curtain 8, metal curtain 8 is located on the interface 9 of drying box 1 and preheating purifier, and the hot gas that comes out from the preheating purifier enters in the drying box 1 by metal curtain 8.Drying box 1 bottom is provided with brazing flux dust collection dish.Metal curtain 8 can be cut into the strip formation of solid matter by light sheet.
Nitrogen-protective soldering furnace batch furnace the key technical indexes and parameter (wherein a kind of specification)
Appearance and size: long by 16500 * wide by 2400 * high by 2400; Braze chamber sectional dimension: wide by 1200 * high by 350; Maximum input space cross section: wide by 1050 * high by 250; Electric power is equipped with: 250kw 380V 50Hz
1. power: 10kw
2. dry heat section: 60kw
3. purify preheating section: 60kw
4. heating soldering section: 120kw
Temperature range:
1. dry heat section: 150～250 ℃, max300 ℃
2. purify preheating section: 300～450 ℃, max500 ℃
3. heating soldering section: 580～650 ℃, max700 ℃
Soldering section temperature control deviation: 〉=5 ℃
Preheating time: 〉=120min first
Workpiece transmission speed: 1000-2000mm/min (frequency control, reference value)
The kind of drive: the transmission of chain belt counting, pitch: 76.2mm (3 inches)
Working method: cycle (intermittently) formula transmission: (5～35 ℃ of operating ambient temperatures)
Cycle time scope: 5～35min/ time (by the actual process requirement)
Beat distance: 2450mm
Nitrogen consumes: 50～80m
3/ h (supply gas pressure: 0.1～0.2MPa constant voltage)
Nitrogen requires: purity:＞99.999%; Dew point :-62 ℃
Cooling-water consumption: 4～8m
3/ h (demineralized water, 10～25 ℃ of water temperatures.The user can provide cooling back installation for oneself, and water quality requirement can be with reference to the GB10067.1-88 standard.)
Compressed air: 0.6～0.8MPa
Operating process and principle brief introduction
At first by the operation requirement, check whether water, electric each road is normal, the technology brazing temperature that the preheating of soldering oven section reached more than 600 ℃ in about 120 minutes heats up and simultaneously the inflated with nitrogen system is opened work to oxygen content and be lower than below the 50PPM.About 20～30 minutes of hothouse work is to reach 150～200 ℃ of technology baking temperatures. and (detail operations is seen explanation in addition) can carry out following operation with that.
1, go up part:
The radiator core body (hereinafter to be referred as workpiece) that will assemble by technological requirement, blow down unnecessary band water solder flux through brazing flux spray and high-pressure blast, then, again workpiece is moved on the driving-belt of last part end of soldering oven mark made from the center or the spacing alarm position that does not exceed positioning detector.
2, drying:
Workpiece in the material loading section through the timing automatic hothouse that moves to, and rest on hothouse and carry out heat drying, make moisture on the workpiece become steam and discharge outdoorly through circulating fan and exhaust outlet, and workpiece is heated to more than 180 ℃, tentatively finish dry run this moment.
3, purify:
After workpiece enters the clean room from hothouse, will be incubated intensification further and utilize the flow of warm nitrogen gas of discharging in the soldering oven to carry out drying and purify to reach the purpose of attenuating oxygen content.This section also is provided with auxiliary nitrogen and regulates inlet, to guarantee depuration quality.
4, soldering:
Move into again after work is cleaned and carry out in the soldering oven heating up under the high pure nitrogen protection.After finishing fine weldering program, workpiece will be admitted to the cooling zone and cool off.
5, water cooling:
Workpiece is that the metallic walls of main carrier and water collar is carried out heat exchanging process with nitrogen atmosphere in the water cooling district, circulating fan and water-cooled heat exchanger make it to improve heat exchanger effectiveness in being aided with, the crystallization of workpiece cooling solder is solidified, form soldered fitting, when workpiece temperature is reduced to below 300 ℃, just can enter into air and carry out air cooling.
6, air cooling:
In air, utilize fan airflow rapidly work-piece cools to be arrived near normal temperature workpiece.
7, following part section:
When workpiece runs to down the part end, near environment temperature (generally not being higher than 20 ℃ of environment temperatures), and require removal before next intermittent duty arrives, to meet the arrival of next workpiece.
In sum, in case after workpiece (same type) constantly progressively enters each active section successively, just enter into duty completely, it can constantly be worked down length by length according to the technological requirement that you set.
Claims (4)
1. nitrogen-protective soldering furnace batch furnace drying device; it is characterized in that; comprise drying box (1); be provided with interior circulating fan (2) in it; cover (3) is separated in tubular electric heating (6) and air channel; interior circulating fan (2) is positioned at the top of drying box (1); air channel separation cover (3) is connected with interior circulating fan (2) and is positioned at its below; thereby make and form the wind closed circuit in the drying box (1); during interior circulating fan (2) work; the wind that separate in the cover (3) in the air channel flows to top from the bottom; flow downward by the outside space of air channel cage (3) through interior circulating fan (2) back; tubular electric heating (6) is positioned at the bottom of drying box (1); and be in the below of transmitting carrier bar (4); workpiece is positioned over that conveyer belt (4) is gone up and both all are in the air channel and separate in the cover (3), also is provided with exhaust outlet (7) on drying box (1) top.
2. nitrogen-protective soldering furnace batch furnace drying device according to claim 1; it is characterized in that; in cover (3) was separated in the air channel, the below of the conveyer belt of place work piece (4) was provided with at least one air channel flow distribution plate (5), and the air channel flow distribution plate has equally distributed hole on (5).
3. nitrogen-protective soldering furnace batch furnace drying device according to claim 1; it is characterized in that also comprising metal curtain (8); metal curtain (8) is located on the interface (9) of drying box (1) and preheating purifier, and the hot gas that comes out from the preheating purifier enters in the drying box (1) by metal curtain (8).
4. nitrogen-protective soldering furnace batch furnace drying device according to claim 1 is characterized in that, drying box (1) bottom is provided with brazing flux dust collection dish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200366047U CN201041454Y (en) | 2007-04-06 | 2007-04-06 | Nitrogen protection brazing furnace intermittent furnace drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200366047U CN201041454Y (en) | 2007-04-06 | 2007-04-06 | Nitrogen protection brazing furnace intermittent furnace drying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041454Y true CN201041454Y (en) | 2008-03-26 |
Family
ID=39253164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200366047U Expired - Fee Related CN201041454Y (en) | 2007-04-06 | 2007-04-06 | Nitrogen protection brazing furnace intermittent furnace drying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041454Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061364A (en) * | 2010-10-25 | 2011-05-18 | 中国十九冶集团有限公司武汉分公司 | Method for dehumidifying and drying electric heating band of annealing furnace |
| CN106766911A (en) * | 2017-01-10 | 2017-05-31 | 深圳市创世纪机械有限公司 | Heating furnace and Curred glass forming machine |
| CN108115239A (en) * | 2016-11-29 | 2018-06-05 | 张跃 | The soldering oven for heating/cooling down and its method of work are carried out by medium of gas |
| CN108115238A (en) * | 2016-11-29 | 2018-06-05 | 张跃 | Using gas as the heating/cooling device and soldering oven of medium |
| CN108224928A (en) * | 2018-01-09 | 2018-06-29 | 张斐斐 | A kind of drying equipment for being used to manufacture carton |
| CN110153527A (en) * | 2019-06-12 | 2019-08-23 | 盐城海荣炉业科技有限公司 | A kind of heating chamber of vacuum brazing furnace |
| CN111037026A (en) * | 2019-12-26 | 2020-04-21 | 盐城海荣炉业科技有限公司 | Muffle-free continuous brazing furnace |
| CN112979139A (en) * | 2021-02-26 | 2021-06-18 | 徐敬玉 | Zero-emission sludge drying system adopting solution absorption-vapor compression combined cycle |
-
2007
- 2007-04-06 CN CNU2007200366047U patent/CN201041454Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061364A (en) * | 2010-10-25 | 2011-05-18 | 中国十九冶集团有限公司武汉分公司 | Method for dehumidifying and drying electric heating band of annealing furnace |
| CN102061364B (en) * | 2010-10-25 | 2013-01-09 | 中国十九冶集团有限公司武汉分公司 | Method for dehumidifying and drying electric heating band of annealing furnace |
| CN108115239A (en) * | 2016-11-29 | 2018-06-05 | 张跃 | The soldering oven for heating/cooling down and its method of work are carried out by medium of gas |
| CN108115238A (en) * | 2016-11-29 | 2018-06-05 | 张跃 | Using gas as the heating/cooling device and soldering oven of medium |
| CN106766911A (en) * | 2017-01-10 | 2017-05-31 | 深圳市创世纪机械有限公司 | Heating furnace and Curred glass forming machine |
| CN108224928A (en) * | 2018-01-09 | 2018-06-29 | 张斐斐 | A kind of drying equipment for being used to manufacture carton |
| CN110153527A (en) * | 2019-06-12 | 2019-08-23 | 盐城海荣炉业科技有限公司 | A kind of heating chamber of vacuum brazing furnace |
| CN110153527B (en) * | 2019-06-12 | 2021-06-08 | 盐城海荣炉业科技有限公司 | Heating chamber of vacuum brazing furnace |
| CN111037026A (en) * | 2019-12-26 | 2020-04-21 | 盐城海荣炉业科技有限公司 | Muffle-free continuous brazing furnace |
| CN112979139A (en) * | 2021-02-26 | 2021-06-18 | 徐敬玉 | Zero-emission sludge drying system adopting solution absorption-vapor compression combined cycle |
| CN112979139B (en) * | 2021-02-26 | 2022-06-28 | 徐敬玉 | Zero-emission sludge drying system adopting solution absorption-vapor compression combined cycle |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080326 Termination date: 20110406 |